<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./Bootstrap/css/bootstrap.min.css">
    <style>
        .container {
            background-color: pink;
        }
    </style>
</head>
<body>
    <!-- bootstrap 希望有个容器 -->
    <div class="container">
        哇哈哈
    </div>
    <div class="container-sm">100% wide until small breakpoint</div>
    <div class="container-md">100% wide until medium breakpoint</div>
    <div class="container-lg">100% wide until large breakpoint</div>
    <div class="container-xl">100% wide until extra large breakpoint</div>
    <div class="container-xxl">100% wide until extra extra large breakpoint</div>   
    <div class="container-fluid">
        哇哈哈
    </div>
</body>
</html>